Let us mention that these equations should be formulated
in the \(\hbar \) -dependent form [1]} to accommodate
the \(\hbar \) -expansion (i.e., genus expansion)
of the Gromov-Witten theory. To avoid notational complexity,
however, we dare not to consider the \(\hbar \) -dependent form.
We can move to the \(\hbar \) -dependent formulation,
at least formally, by rescaling the variables
as \(t_k \rightarrow t_k/\hbar \) , \(\bar{t}_k\rightarrow \bar{t}_k/\hbar \) 
and \(s \rightarrow s/\hbar \) .
